Originally Posted by Alexus

Telfon and silicone are non-stick, which means that they keep dust and dirt off your car and keep it looking at its greatest. Both of these products, though, do not remain on the surface of your paint like other types of waxes. They penetrate deep into the paint, down to the primer, and can make repainting the car practically impossible without sanding down to the sheet metal. A Teflon-coated car is a car painter's worst nightmare. It can also make even minor touch-ups difficult, especially if you plan on using a blob eliminator product afterwards.